US11871312B2 - Method and apparatus of sidelink resource allocation for V2X in new radio mobile communications - Google Patents
Method and apparatus of sidelink resource allocation for V2X in new radio mobile communications Download PDFInfo
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Definitions
- the present disclosure is generally related to wireless communications and, more particularly, to techniques pertaining to sidelink resource allocation for vehicle-to-everything (V2X) in New Radio (NR) mobile communications.
- V2X vehicle-to-everything
- NR New Radio
- LTE V2X Under the 3 rd Generation Partnership Project (3GPP) specifications, Long-Term Evolution (LTE) V2X configures resource pools for sidelink transmissions, and the transmissions are realized by a semi-persistent scheduling (SPS)-like resource allocation type. While LTE V2X supports broadcast transmission and periodic traffic patterns only, it is desirable that NR V2X supports unicast, groupcast and broadcast transmissions as well as both periodic and aperiodic traffic patterns. In addition, it is also desirable that NR V2X supports low-latency and/or high-reliability services for some use cases.
- SPS semi-persistent scheduling
- NR Based on different requirements of NR, it is desirable for resource allocation types supported in NR to be more than those supported in LTE V2X.
- eMBB enhanced mobile broadband
- NR has three types of resource allocation techniques, namely: dynamic grants, Type-1 grant-free (GF), and Type-2 SPS.
- Type-1 GF and Type-2 SPS can achieve lower latency than dynamic grants.
- dynamic grants offer good reliability and tend to be suitable for network-controlled scheduling when a user equipment (UE) is in coverage. Due to high signaling overhead, dynamic grants are also suitable for aperiodic traffic whereas Type-1 GF and Type-2 SPS tend to perform well with periodic traffic patterns.
- Type-1 GF Reconfiguration of some link parameter (e.g., modulation coding scheme (MCS)) is signaled via radio resource control (RRC) in Type-1 GF, while link adaptation parameters can be signaled via downlink control information (DCI) in dynamic grants and Type-2 SPS.
- RRC radio resource control
- DCI downlink control information
- the present disclosure aims to propose concepts, solutions, schemes, techniques, designs, methods and apparatus pertaining to sidelink resource allocation for V2X in NR mobile communications.
- a method may involve a processor of an apparatus, implemented in a first UE, receiving a first signaling from a network node of a wireless network, with the first signaling configuring a first sidelink resource for a sidelink between the first UE and a second UE.
- the method may also involve the processor transmitting a packet or transport block (TB) to the second UE on the sidelink using the configured first sidelink resource.
- the method may further involve the processor receiving a second signaling from the network node responsive to the second UE failing to decode the packet or TB, with the second signaling dynamically configuring a second sidelink resource for the sidelink.
- the method may additionally involve the processor retransmitting the packet or TB to the second UE on the sidelink using the dynamically configured second sidelink resource.
- a method may involve a processor of an apparatus, implemented in a first UE, receiving a first signaling from a network node of a wireless network, with the first signaling configuring a first sidelink resource for a sidelink between the first UE and a second UE.
- the method may also involve the processor transmitting a packet or TB to the second UE on the sidelink using the configured first sidelink resource.
- the method may further involve the processor receiving a hybrid automatic repeat request negative acknowledgement (HARQ-NACK) from the second UE responsive to the second UE failing to decode the packet or TB.
- HARQ-NACK hybrid automatic repeat request negative acknowledgement
- the method may additionally involve the processor switching between a first mode of operation and a second mode of operation before a retransmission of the packet of TB to the second UE due to the NACK-ACK.
- resource allocation for the sidelink may be controlled by the network node, and, in the second mode of operation, the resource allocation for the sidelink may be preconfigured by the network node and autonomously controlled by the first UE.
- an apparatus implemented as a first UE may include a transceiver and a processor coupled to the transceiver.
- the transceiver may be configured to wirelessly communicate with a second UE and a network node of a wireless network.
- the processor may be configured to perform some operations, including: (a) receiving, via the transceiver, a first signaling from a network node of a wireless network, the first signaling configuring a first sidelink resource for a sidelink between the first UE and a second UE; (b) transmitting, via the transceiver, a packet or TB to the second UE on the sidelink using the configured first sidelink resource; (c) receiving, via the transceiver, a second signaling from the network node responsive to the second UE failing to decode the packet or TB, the second signaling dynamically configuring a second sidelink resource for the sidelink; and (d) retransmitting, via the transceiver, the packet or TB to the second UE on
- radio access technologies such as NR V2X
- the proposed concepts, schemes and any variation(s)/derivative(s) thereof may be implemented in, for and by other types of radio access technologies, networks and network topologies such as, for example and without limitation, 5 th Generation (5G), Long-Term Evolution (LTE), LTE-Advanced, LTE-Advanced Pro and any future-developed networks and technologies.
- 5G 5 th Generation
- LTE Long-Term Evolution
- LTE-Advanced LTE-Advanced
- LTE-Advanced Pro any future-developed networks and technologies.
- FIG. 1 is a diagram of an example network environment in which various solutions and schemes in accordance with the present disclosure may be implemented.
- FIG. 2 is a flowchart of an example operational procedure in accordance with an implementation of the present disclosure.
- FIG. 3 is a block diagram of an example communication system in accordance with an implementation of the present disclosure.
- FIG. 4 is a flowchart of an example process in accordance with an implementation of the present disclosure.
- FIG. 5 is a flowchart of an example process in accordance with an implementation of the present disclosure.
- Implementations in accordance with the present disclosure relate to various techniques, methods, schemes and/or solutions pertaining to sidelink resource allocation for V2X in NR mobile communications.
- a number of possible solutions may be implemented separately or jointly. That is, although these possible solutions may be described below separately, two or more of these possible solutions may be implemented in one combination or another.
- FIG. 1 illustrates an example network environment 100 in which various solutions and schemes in accordance with the present disclosure may be implemented.
- FIG. 2 illustrates an example operational procedure 200 with respect to NR sidelink resource allocation for V2X in accordance with an implementation of the present disclosure. Operational procedure 200 may be implemented in network environment 100 .
- the following description of various proposed schemes in accordance with the present disclosure is provided with reference to FIG. 1 and FIG. 2 .
- network environment 100 may be an NR V2X communication environment involving a first UE 110 , a second UE 120 and a wireless network 130 .
- Wireless network 130 may be in wireless communication with first UE 110 via a base station 135 (e.g., an eNB, gNB or transmit/receive point (TRP)), and first UE 110 may be in wireless communication with second UE 120 via NR sidelink.
- base station 135 e.g., an eNB, gNB or transmit/receive point (TRP)
- TRP transmit/receive point
- first UE 110 and second UE 120 may be in or as a part of, for example and without limitation, a portable apparatus (e.g., smartphone), a vehicle or a component thereof, a roadside unit (RSU) (e.g., a traffic signal, a street lamp, a roadside sensor or a roadside structure) or an Internet of Thing (IoT) device (e.g., a sensor).
- RSU roadside unit
- IoT Internet of Thing
- first UE 110 , second UE 120 and wireless network 130 may implement various schemes pertaining to sidelink resource allocation for V2X in NR mobile communications in accordance with the present disclosure, as described below.
- Part (A) of FIG. 1 illustrates first UE 110 and second UE 120 operating in Mode-1 of NR sidelink resource allocation (of network-controlled resource allocation) as first UE 110 is in coverage of base station 135 and there is data to be transmitted from first UE 110 to second UE 120 via NR sidelink.
- allocation of resources on the sidelink between first UE 110 and second UE 120 may be controlled by base station 135 .
- Part (B) of FIG. 1 illustrates first UE 110 and second UE 120 operating in Mode-2 of NR sidelink resource allocation (or UE-autonomous resource allocation) as first UE 110 is out of coverage of base station 135 and there is data to be transmitted from first UE 110 to second UE 120 via NR sidelink.
- allocation of resources on the sidelink between first UE 110 and second UE 120 may be preconfigured by base station 130 and then autonomously controlled by first UE 110 . It is noteworthy that, while first UE 110 is out of coverage of base station 135 on one frequency, first UE 110 may at the same time be in coverage with another base station of another network on a different frequency, and vice versa. That is, so long as first UE 110 is in coverage of a given base station, whether base station 135 or another base station (not shown), that base station may control the resource allocation for the sidelink between first UE 110 and second UE 120 under Mode-1 of NR sidelink resource allocation.
- procedure 200 may include one or more operations, actions, or functions as represented by one or more of blocks 210 , 220 , 230 , 240 , 250 , 260 , 270 and 280 . Although illustrated as discrete blocks, various blocks of procedure 200 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation.
- Procedure 200 may be implemented by in network environment 100 in accordance with the present disclosure. Procedure 200 may begin at 210 .
- procedure 200 may involve base station 135 transmitting a dynamic grant to first UE 110 which functions as a source UE or a transmitting (Tx) UE. Procedure 200 may proceed from 210 to 220 .
- procedure 200 may involve first UE 110 transmitting one or more packets or transport blocks (TBs) to second UE 120 which functions as a destination UE or a receiving (Rx) UE. Procedure 200 may proceed from 220 to 230 .
- TBs transport blocks
- Rx receiving
- procedure 200 may involve second UE 120 attempting to decode the one or more packets/TBs. Procedure 200 may proceed from 230 to 240 .
- procedure 200 may involve second UE 120 determining whether the attempted decoding is a success of failure. In case of failed decoding, procedure 200 may proceed from 240 to 250 . Otherwise, in case of successful decoding, procedure 200 may end.
- procedure 200 may involve second UE 120 transmitting a hybrid automatic repeat request (HARQ) negative acknowledgement (NACK) to first UE 110 .
- Procedure 200 may proceed from 250 to 260 .
- HARQ hybrid automatic repeat request
- NACK negative acknowledgement
- procedure 200 may involve first UE 110 transmitting or forwarding the HARQ-NACK to base station 135 .
- Procedure 200 may proceed from 260 to 270 .
- procedure 200 may involve base station 135 transmitting a new dynamic grant to first UE 110 .
- Procedure 200 may proceed from 270 to 280 .
- procedure 200 may involve first UE 110 retransmitting the same packet(s)/TB(s) to second UE 120 .
- Procedure 200 may proceed from 280 to 240 and may either end or proceed from 240 to 250 as described above.
- first UE 110 may be utilized by first UE 110 , second UE 120 and base station 130 in executing procedure 200 .
- procedure 200 may be applied and executed by first UE 110 , second UE 120 and base station 130 in each of the proposed scheme described below.
- NR sidelink supports both aperiodic and periodic traffic with both small and large packet sizes, and NR sidelink offers unicast, groupcast and broadcast types of transmission.
- scheduling decisions may be made based on requirements and channel conditions. Since all three resource allocation techniques of dynamic grants, Type-1 GF and Type-2 SPS in NR are controlled or preconfigured by base station 135 , they can be considered for sidelink Mode-1 operation.
- first UE 110 may determine or otherwise select transmission resources from a pool of preconfigured sidelink resources.
- an RRC-configured technique similar to Type-1 GF may be suitable for broadcast and groupcast transmissions when no link adaptation may be needed.
- Base station 135 may preconfigure first UE 110 by RRC when first UE 110 is in coverage. Activation may either be triggered via RRC from base station 135 when first UE 110 is still in coverage or, alternatively, triggered autonomously when first UE 110 falls out of coverage.
- SCI sidelink control information
- configuration and activation may be triggered via DCI from base station 135 , and reconfiguration may also be triggered via SCI on sidelink when first UE 110 operates in Mode-2.
- retransmissions of a failed packet or TB may be triggered in sidelink with a dynamic grant for better transmission reliability.
- multiple resource allocation techniques based on available techniques in NR framework for eMBB uplink (UL) transmission may be utilized by first UE 110 , second UE 120 and base station 135 for NR sidelink resource allocation.
- first UE 110 operates in a network-controlled mode (Mode-1) or in an autonomous mode (Mode-2)
- a dynamic grant-like technique when first UE 110 operates in a network-controlled mode (Mode-1) or in an autonomous mode (Mode-2), a dynamic grant-like technique, a Type-1 GF-like technique and/or a Type-2 SPS-like technique may be utilized for resource allocation for the sidelink between first UE 110 and second UE 120 .
- the dynamic grant-like technique in terms of configuration, two options may be available, namely: (1) DCI from base station 135 or (2) SCI from another UE.
- the dynamic grant-like technique may be utilized either for retransmissions or for both initial transmissions and retransmissions.
- SCI-based configuration may be more suitable for the case in which only retransmissions are allowed under the dynamic grant-like technique.
- first UE 110 When first UE 110 operates in Mode-1, DCI from base station 135 may configure transmission resources, resource pool selection, and link adaptation parameters regarding the NR sidelink between first UE 110 and second UE 120 , and retransmissions may be configured in the same manner.
- DCI from base station 135 may configure transmission resources, resource pool selection, and link adaptation parameters regarding the NR sidelink between first UE 110 and second UE 120 , and retransmissions may be configured in the same manner.
- SCI from another UE e.g., second UE 120 or a different UE (not shown)
- may configure transmission resources, resource pool selection, and link adaptation parameters regarding the NR sidelink between first UE 110 and second UE 120 , and retransmissions may be configured in the same manner.
- first UE 110 may continue using the procedure described herein for the dynamic grant configuration for retransmission (as long as link is still alive). For instance, after first UE 110 switches from Mode-2 to Mode-1, first UE 110 may continue to monitor SCI for retransmission configuration. In a second approach, first UE 110 may switch to a different procedure for the dynamic grant configuration for retransmissions (as long as the link is still alive).
- first UE 110 may stop monitoring SCI and, instead, may monitor DCI for retransmission configuration (for the packet/TB for which an initial transmission was configured via SCI).
- first UE 110 may monitor both DCI and SCI as a combination of the two approaches described above.
- one option may be available ant that involves RRC signaling from base station 135 .
- two options may be available, namely: (1) DCI from base station 135 and (2) SCI from another UE.
- RRC from base station 135 may configure transmission resources, resource pool selection, and link adaptation parameters regarding the NR sidelink between first UE 110 and second UE 120 .
- Activation and deactivation of the Type-1 GF configuration may be provided by RRC from base station 135 .
- Reconfiguration of some link parameters e.g., modulation coding scheme (MCS), power control, a precoding matrix indicator (PMI), a rank indicator (RI), or a combination thereof
- MCS modulation coding scheme
- PMI precoding matrix indicator
- RI rank indicator
- Retransmission of a failed packet/TB may be configured by another dynamic grant-like signaling from wireless network 130 .
- RRC from base station 135 may preconfigure transmission resources, resource pool selection, and link adaptation parameters regarding the NR sidelink between first UE 110 and second UE 120 .
- preconfigure refers to a previous configuration when first UE 10 was in cellular coverage of base station 135 .
- Activation and deactivation of the Type-1 GF configuration may be provided by either RRC from base station 135 (when first UE 110 is in coverage) or by SCI from another UE (e.g., second UE 120 or a different UE (not shown)).
- Reconfiguration of some link parameters may be provided by RRC from base station 135 (when first UE 110 is in coverage) or by SCI from another UE.
- Retransmission of a failed packet/TB may be configured by another dynamic grant-like signaling from wireless network 130 .
- one option may be available ant that involves RRC signaling from base station 135 .
- two options may be available, namely: (1) RRC from base station 135 and (2) SCI from another UE.
- RRC from base station 135 may configure transmission resources, resource pool selection, and link adaptation parameters regarding the NR sidelink between first UE 110 and second UE 120 .
- Activation and deactivation of the Type-2 SPS configuration may be provided by DCI from base station 135 .
- Reconfiguration of some link parameters e.g., MCS, power control, a PMI, an RI, or a combination thereof
- Retransmission of a failed packet/TB may be configured by another dynamic grant-like signaling from wireless network 130 .
- RRC from base station 135 may preconfigure transmission resources, resource pool selection, and link adaptation parameters regarding the NR sidelink between first UE 110 and second UE 120 .
- preconfigure refers to a previous configuration when first UE 10 was in cellular coverage of base station 135 .
- Activation and deactivation of the Type-2 SPS configuration may be provided by either DCI from base station 135 (when first UE 110 is in coverage) or by SCI from another UE (e.g., second UE 120 or a different UE (not shown)).
- Reconfiguration of some link parameters may be provided by DCI from base station 135 (when first UE 110 is in coverage) or by SCI from another UE.
- Retransmission of a failed packet/TB may be configured by another dynamic grant-like signaling from wireless network 130 .
- SCI may convey or otherwise carry some sidelink parameters for the sidelink, including transmission resources, selection of a preconfigured resource pool, MCS, power control, a PMI, an RI, and so on.
- the list of configurable link parameters carried by SCI may depend on the resource allocation mode under which first UE 110 operates. For instance, first UE 110 may be expected to receive only link adaptation parameters from SCI in Mode-1 whereas first UE 110 may be expected to receive both link adaptation parameters and transmission resources from SCI in Mode-1.
- the list of configurable link parameters carried by SCI may also depend on whether the transmission is an initial transmission or a retransmission. For instance, all configuration parameters may be received via DCI from base station 135 when first UE 110 is in Mode-1. However, first UE 110 may be expected to receive retransmission configurations for the same packet/TB via SCI from a source UE even if second UE 120 , as the destination UE, still operates in Mode-1.
- the list of configurable link parameters carried by SCI may be fixed in the 3GPP specifications (e.g., Rel-16) or the list may be signaled by wireless network 130 .
- such information may be provided in broadcast signaling (e.g., system information block (SIB)).
- SIB system information block
- this information may be RRC-configured for first UE 110 .
- FIG. 3 illustrates an example communication system 300 having an example apparatus 310 and an example apparatus 320 in accordance with an implementation of the present disclosure.
- apparatus 310 and apparatus 320 may perform various functions to implement schemes, techniques, processes and methods described herein pertaining to sidelink resource allocation for V2X in NR mobile communications, including various schemes described above as well as processes described below.
- Each of apparatus 310 and apparatus 320 may be a part of an electronic apparatus, which may be a UE such as a vehicle, a portable or mobile apparatus, a wearable apparatus, a wireless communication apparatus or a computing apparatus.
- each of apparatus 310 and apparatus 320 may be implemented in an electronic control unit (ECU) of a vehicle, a smartphone, a smartwatch, a personal digital assistant, a digital camera, or a computing equipment such as a tablet computer, a laptop computer or a notebook computer.
- ECU electronice control unit
- Each of apparatus 310 and apparatus 320 may also be a part of a machine type apparatus, which may be an IoT or NB-IoT apparatus such as an immobile or a stationary apparatus, a home apparatus, a wire communication apparatus or a computing apparatus.
- each of apparatus 310 and apparatus 320 may be implemented in a smart thermostat, a smart fridge, a smart door lock, a wireless speaker or a home control center.
- each of apparatus 310 and apparatus 320 may be implemented in the form of one or more integrated-circuit (IC) chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, or one or more complex-instruction-set-computing (CISC) processors.
- IC integrated-circuit
- CISC complex-instruction-set-computing
- Each of apparatus 310 and apparatus 320 may include at least some of those components shown in FIG. 3 such as a processor 312 and a processor 322 , respectively.
- Each of apparatus 310 and apparatus 320 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and/or user interface device), and, thus, such component(s) of each of apparatus 310 and apparatus 320 are neither shown in FIG. 3 nor described below in the interest of simplicity and brevity.
- components not pertinent to the proposed scheme of the present disclosure e.g., internal power supply, display device and/or user interface device
- At least one of apparatus 310 and apparatus 320 may be a part of an electronic apparatus, which may be a vehicle, a roadside unit (RSU), network node or base station (e.g., eNB, gNB or TRP), a small cell, a router or a gateway.
- RSU roadside unit
- network node or base station e.g., eNB, gNB or TRP
- a small cell e.g., a small cell
- a router or a gateway e.g., a gateway.
- at least one of apparatus 310 and apparatus 320 may be implemented in a vehicle in a V2V or V2X network, an eNodeB in an LTE, LTE-Advanced or LTE-Advanced Pro network or in a gNB in a 5G, NR, IoT or NB-IoT network.
- apparatus 310 and apparatus 320 may be implemented in the form of one or more IC chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, or one or more CISC processors.
- each of processor 312 and processor 322 may be implemented in the form of one or more single-core processors, one or more multi-core processors, or one or more CISC processors. That is, even though a singular term “a processor” is used herein to refer to processor 312 and processor 322 , each of processor 312 and processor 322 may include multiple processors in some implementations and a single processor in other implementations in accordance with the present disclosure.
- each of processor 312 and processor 322 may be implemented in the form of hardware (and, optionally, firmware) with electronic components including, for example and without limitation, one or more transistors, one or more diodes, one or more capacitors, one or more resistors, one or more inductors, one or more memristors and/or one or more varactors that are configured and arranged to achieve specific purposes in accordance with the present disclosure.
- each of processor 312 and processor 322 is a special-purpose machine specifically designed, arranged and configured to perform specific tasks including sidelink resource allocation for V2X in NR mobile communications in accordance with various implementations of the present disclosure.
- apparatus 310 may also include a transceiver 316 , as a communication device, coupled to processor 312 and capable of wirelessly transmitting and receiving data.
- apparatus 310 may further include a memory 314 coupled to processor 312 and capable of being accessed by processor 312 and storing data therein.
- apparatus 320 may also include a transceiver 326 , as a communication device, coupled to processor 322 and capable of wirelessly transmitting and receiving data.
- apparatus 320 may further include a memory 324 coupled to processor 322 and capable of being accessed by processor 322 and storing data therein. Accordingly, apparatus 310 and apparatus 320 may wirelessly communicate with each other via transceiver 316 and transceiver 326 , respectively.
- apparatus 310 is implemented in or as a wireless communication device
- a communication apparatus or a UE e.g., first UE 110
- apparatus 320 is implemented in or as a network node (e.g., base station 135 of wireless network 130 ).
- processor 312 of apparatus 310 may receive, via transceiver 316 , a first signaling from apparatus 320 as a network node of a wireless network, with the first signaling configuring a first sidelink resource for a sidelink between the first UE and a second UE. Additionally, processor 312 may transmit, via transceiver 316 , a packet or TB to the second UE on the sidelink using the configured first sidelink resource.
- processor 312 may receive, via transceiver 316 , a second signaling from apparatus 320 in response to the second UE failing to decode the packet or TB, with the second signaling dynamically configuring a second sidelink resource for the sidelink. Furthermore, processor 312 may retransmit, via transceiver 316 , the packet or TB to the second UE on the sidelink using the dynamically configured second sidelink resource.
- the first signaling may include an RRC signaling
- the second signaling may include a DCI signaling.
- the RRC signaling may include a semi-persistent grant that configures sidelink resource allocation for the sidelink.
- the DCI signaling may dynamically configure the second sidelink resource.
- the first signaling may include a first DCI signaling
- the second signaling may include a second DCI signaling.
- the first DCI signaling may include a semi-persistent grant that configures sidelink resource allocation for the sidelink.
- the second DCI signaling may dynamically configure the second sidelink resource.
- the first DCI signaling may include a dynamic grant that configures sidelink resource allocation for the sidelink to dynamically configure the first sidelink resource.
- the second DCI signaling may dynamically configure the second sidelink resource.
- processor 312 may receive the second signaling from apparatus 320 in response to some previous operations. For instance, processor 312 may receive, via transceiver 316 , a HARQ-NACK from the second UE in response to the second UE failing to decode the packet or TB. Additionally, processor 312 may transmit, via transceiver 316 , the HARQ-NACK to apparatus 320 .
- processor 312 may receive, via transceiver 316 , scheduling-related information from the second UE via an SCI signaling.
- the scheduling-related information may include a resource allocation grant, one or more link adaptation parameters for the sidelink, or a combination thereof.
- processor 312 of apparatus 310 may receive, via transceiver 316 , a signaling from apparatus 320 as a network node of a wireless network, with the signaling configuring a first sidelink resource for a sidelink between the first UE and a second UE. Additionally, processor 312 may transmit, via transceiver 316 , a packet or TB to the second UE on the sidelink using the configured first sidelink resource.
- processor 312 may receive, via transceiver 316 , a HARQ-NACK from the second UE in response to the second UE failing to decode the packet or TB. Furthermore, processor 312 may switch between a first mode of operation and a second mode of operation before a retransmission of the packet of TB to the second UE due to the NACK-ACK. In the first mode of operation, resource allocation for the sidelink may be controlled by apparatus 320 , and, in the second mode of operation, the resource allocation for the sidelink may be preconfigured by apparatus 320 and autonomously controlled by processor 312 .
- processor 312 may perform additional operations. For instance, processor 312 may apply a configuration from the first mode of operation for the retransmission of the packet or TB when in the second mode of operation. Moreover, processor 312 may perform, via transceiver 316 , the retransmission of the packet of TB to the second UE using a second sidelink resource configured by the configuration.
- the configuration may include a configuration for a plurality of parameters of the sidelink comprising a MCS, power control, a PMI, an RI, or a combination thereof.
- processor 312 may perform additional operations. For instance, processor 312 may apply a configuration from the second mode of operation for the retransmission of the packet or TB when in the first mode of operation. Moreover, processor 312 may perform, via transceiver 316 , the retransmission of the packet of TB to the second UE using a second sidelink resource configured by the configuration.
- the configuration may include a configuration for a plurality of parameters of the sidelink comprising a MCS, power control, a PMI, an RI, or a combination thereof.
- FIG. 4 illustrates an example process 400 in accordance with an implementation of the present disclosure.
- Process 400 may be an example implementation of the proposed schemes described above with respect to sidelink resource allocation for V2X in NR mobile communications in accordance with the present disclosure.
- Process 400 may represent an aspect of implementation of features of apparatus 310 and apparatus 320 .
- Process 400 may include one or more operations, actions, or functions as illustrated by one or more of blocks 410 , 420 , 430 and 440 . Although illustrated as discrete blocks, various blocks of process 400 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks of process 400 may executed in the order shown in FIG. 4 or, alternatively, in a different order. Process 400 may also be repeated partially or entirely.
- Process 400 may be implemented by apparatus 310 , apparatus 320 and/or any suitable wireless communication device, UE, RSU, base station or machine type devices. Solely for illustrative purposes and without limitation, process 400 is described below in the context of apparatus 310 as a UE (e.g., first UE 110 ) and apparatus 320 as a network node (e.g., base station 135 of wireless network 130 ). Process 400 may begin at block 410 .
- process 400 may involve processor 312 of apparatus 310 , implemented in a first UE (e.g., first UE 110 ), receiving, via transceiver 316 , a first signaling from apparatus 320 as a network node of a wireless network, with the first signaling configuring a first sidelink resource for a sidelink between the first UE and a second UE.
- Process 400 may proceed from 410 to 420 .
- process 400 may involve processor 312 transmitting, via transceiver 316 , a packet or TB to the second UE on the sidelink using the configured first sidelink resource.
- Process 400 may proceed from 420 to 430 .
- process 400 may involve processor 312 receiving, via transceiver 316 , a second signaling from apparatus 320 in response to the second UE failing to decode the packet or TB, with the second signaling dynamically configuring a second sidelink resource for the sidelink.
- Process 400 may proceed from 430 to 440 .
- process 400 may involve processor 312 retransmitting, via transceiver 316 , the packet or TB to the second UE on the sidelink using the dynamically configured second sidelink resource.
- the first signaling may include an RRC signaling
- the second signaling may include a DCI signaling.
- the RRC signaling may include a semi-persistent grant that configures sidelink resource allocation for the sidelink.
- the DCI signaling may dynamically configure the second sidelink resource.
- the first signaling may include a first DCI signaling
- the second signaling may include a second DCI signaling.
- the first DCI signaling may include a semi-persistent grant that configures sidelink resource allocation for the sidelink.
- the second DCI signaling may dynamically configure the second sidelink resource.
- the first DCI signaling may include a dynamic grant that configures sidelink resource allocation for the sidelink to dynamically configure the first sidelink resource.
- the second DCI signaling may dynamically configure the second sidelink resource.
- process 400 may involve processor 312 receiving the second signaling from apparatus 320 in response to some previous operations. For instance, process 400 may involve processor 312 receiving, via transceiver 316 , a HARQ-NACK from the second UE in response to the second UE failing to decode the packet or TB. Additionally, process 400 may involve processor 312 transmitting, via transceiver 316 , the HARQ-NACK to apparatus 320 .
- process 400 may also involve processor 312 receiving, via transceiver 316 , scheduling-related information from the second UE via an SCI signaling.
- the scheduling-related information may include a resource allocation grant, one or more link adaptation parameters for the sidelink, or a combination thereof.
- FIG. 5 illustrates an example process 500 in accordance with an implementation of the present disclosure.
- Process 500 may be an example implementation of the proposed schemes described above with respect to sidelink resource allocation for V2X in NR mobile communications in accordance with the present disclosure.
- Process 500 may represent an aspect of implementation of features of apparatus 310 and apparatus 320 .
- Process 500 may include one or more operations, actions, or functions as illustrated by one or more of blocks 510 , 520 , 530 and 540 . Although illustrated as discrete blocks, various blocks of process 500 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks of process 500 may executed in the order shown in FIG. 5 or, alternatively, in a different order. Process 500 may also be repeated partially or entirely.
- Process 500 may be implemented by apparatus 310 , apparatus 320 and/or any suitable wireless communication device, UE, RSU, base station or machine type devices. Solely for illustrative purposes and without limitation, process 500 is described below in the context of apparatus 310 as a UE (e.g., first UE 110 ) and apparatus 320 as a network node (e.g., base station 135 of wireless network 130 ). Process 500 may begin at block 510 .
- process 500 may involve processor 312 of apparatus 310 , implemented in a first UE (e.g., first UE 110 ), receiving, via transceiver 316 , a signaling from apparatus 320 as a network node of a wireless network, with the signaling configuring a first sidelink resource for a sidelink between the first UE and a second UE.
- Process 500 may proceed from 510 to 520 .
- process 500 may involve processor 312 transmitting, via transceiver 316 , a packet or TB to the second UE on the sidelink using the configured first sidelink resource.
- Process 500 may proceed from 520 to 530 .
- process 500 may involve processor 312 receiving, via transceiver 316 , a HARQ-NACK from the second UE in response to the second UE failing to decode the packet or TB.
- Process 500 may proceed from 530 to 540 .
- process 500 may involve processor 312 switching between a first mode of operation and a second mode of operation before a retransmission of the packet of TB to the second UE due to the NACK-ACK.
- resource allocation for the sidelink may be controlled by apparatus 320
- the resource allocation for the sidelink may be preconfigured by apparatus 320 and autonomously controlled by processor 312 .
- process 500 may involve processor 312 performing additional operations. For instance, process 500 may involve processor 312 applying a configuration from the first mode of operation for the retransmission of the packet or TB when in the second mode of operation. Moreover, process 500 may involve processor 312 performing, via transceiver 316 , the retransmission of the packet of TB to the second UE using a second sidelink resource configured by the configuration.
- the configuration may include a configuration for a plurality of parameters of the sidelink comprising a MCS, power control, a PMI, an RI, or a combination thereof.
- process 500 may involve processor 312 performing additional operations. For instance, process 500 may involve processor 312 applying a configuration from the second mode of operation for the retransmission of the packet or TB when in the first mode of operation. Moreover, process 500 may involve processor 312 performing, via transceiver 316 , the retransmission of the packet of TB to the second UE using a second sidelink resource configured by the configuration.
- the configuration may include a configuration for a plurality of parameters of the sidelink comprising a MCS, power control, a PMI, an RI, or a combination thereof.
- any two components so associated can also be viewed as being “operably connected”, or “operably coupled”, to each other to achieve the desired functionality, and any two components capable of being so associated can also be viewed as being “operably couplable”, to each other to achieve the desired functionality.
- operably couplable include but are not limited to physically mateable and/or physically interacting components and/or wirelessly interactable and/or wirelessly interacting components and/or logically interacting and/or logically interactable components.
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WO2021002634A1 (en) * | 2019-07-03 | 2021-01-07 | 엘지전자 주식회사 | Operation method in v2x device mounted on vehicle |
EP3996415B1 (en) * | 2019-08-16 | 2023-10-11 | LG Electronics Inc. | Methods for transmitting and receiving downlink information in wireless communication system supporting internet of things, and apparatus therefor |
US11818737B2 (en) * | 2019-12-18 | 2023-11-14 | Qualcomm Incorporated | Methods and apparatuses for data retransmission using sidelink diversity |
US11576070B2 (en) * | 2020-05-27 | 2023-02-07 | Qualcomm Incorporated | Channel measurements and concurrent messages for user equipment with multiple transmit-receive points |
US11706752B2 (en) * | 2020-07-09 | 2023-07-18 | Qualcomm Incorporated | Semi-persistent scheduling (SPS) for sidelink groupcast |
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